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Content Provider | IET Digital Library |
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Author | Du, Xiong Wu, Yue Gu, Shida Tai, Heng Ming Sun, Pengju Ji, Yongliang |
Abstract | Control of three-phase grid-connected voltage source converter under unbalanced grid faults greatly depends on the active and reactive powers processed by the converter. The instantaneous active power theory with sequence decomposition is employed to analyse the instantaneous power components, especially the second-order oscillation power. Study shows that the second-order oscillation power comprises two quadrature components, the cosine and sine terms, which are contributed by the average active power and the average reactive power, respectively. This finding sheds insight on the regulation of oscillation power under unbalanced grid conditions. Based on this observation, the authors propose a positive and negative sequence conductance and susceptance control scheme, which enables simple regulation of the active power or reactive power oscillation with the average active power and reactive power control. In addition, the authors investigate the relationship between the positive/negative sequence conductance and susceptance distribution factors with power oscillation and peak current. A maximum current limitation scheme is embedded into the current reference generation block for overcurrent protection. Numerical simulations and prototype measurements verify the accuracy of the analysis and the effectiveness of the control scheme. |
Starting Page | 2162 |
Ending Page | 2173 |
Page Count | 12 |
ISSN | 17554535 |
Volume Number | 9 |
e-ISSN | 17554543 |
Issue Number | Issue 11, Sep (2016) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/9/11 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0804 |
Journal | IET Power Electronics |
Publisher Date | 2016-09-07 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Control of Electric Power System Cosine Term Current Reference Generation Block Instantaneous Active Power Theory Instantaneous Power Component Analysis Maximum Current Limitation Scheme Negative Sequence Conductance Numerical Simulation Oscillation Power Regulation Overcurrent Protection Positive Sequence Conductance Power And Energy Control Power Converter Power Grid Power Oscillation Analysis Power Supplies to Apparatus Power System Fault Reactive Power Control Reactive Power Oscillation Second-order Oscillation Power Sequence Decomposition Sine Term Susceptance Control Scheme Susceptance Distribution Factors Three-phase Grid-connected Voltage Source Converter Control Unbalanced Grid Fault |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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